Studies have been performed that suggest that rituximab works well in cryoglobulinemic vasculitis particularly when associated with hepatitis C infection, and some of these studies are already published. Other types of vasculitis in which rituximab seems likely to work (polyarteritis nodosa, EGPA/Churg-Strauss) are more difficult to study due to their rarity. It seems unlikely that rituximab would be effective in giant cell arteritis or Takayasu’s arteritis, and therefore it may be a long time before studies are done in these diseases.
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